AutoCodes – GMC – C12B7 GMC

C12B7 GMC Code - ABS High Pressure Accumulator Pressure Sensor Circuit Short to Battery

Quick Answer

The high pressure accumulator is attached to the brake pressure modulator and provides up to 18, 000 kPa (2, 600 psi) for use when applying the brakes. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C12B7 GMC indicates ABS High Pressure Accumulator Pressure Sensor Circuit Short to Battery.
Common causes: Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,023

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C12B7 GMC Description

The high pressure accumulator is attached to the brake pressure modulator and provides up to 18, 000 kPa (2, 600 psi) for use when applying the brakes. The Electronic Brake Control Module (EBCM) uses input from the high pressure accumulator sensor for more accurate control during braking and vehicle stability enhancement system event.

OBDII Code C12B7 GMC - ABS High Pressure Accumulator Pressure Sensor Circuit Short to Battery - AutoCodes.com — C12B7 GMC Code - ABS High Pressure Accumulator Pressure Sensor Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC C12B7 GMC?

Faulty Brake Pressure Modulator
Brake Pressure Modulator harness is open or shorted
Brake Pressure Modulator circuit poor electrical connection

How to Fix the DTC C12B7 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C12B7 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C12B7 GMC code?

Need more information on how to fix the C12B7 GMC code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C12B7 GMC Code

1. What are the common symptoms of OBDII code C12B7 GMC?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the braking system.

2. What causes the OBDII code C12B7 GMC to trigger?

- This code is typically triggered by a short circuit to the battery in the ABS high pressure accumulator pressure sensor circuit.

3. How can I diagnose the ABS high pressure accumulator pressure sensor circuit short to battery issue?

- Diagnosing this issue involves using a diagnostic scanner to retrieve the specific trouble code, inspecting the wiring for any visible damage, and testing the sensor for proper functioning.

4. Can driving with OBDII code C12B7 GMC be dangerous?

- Driving with this code can be risky as it may lead to compromised ABS performance, potentially affecting the vehicle's ability to brake effectively in emergency situations.

5. What are the repair options for resolving the ABS high pressure accumulator pressure sensor circuit short to battery issue?

- Repair options may include repairing or replacing damaged wiring, replacing the faulty sensor, or resetting the ABS system after addressing the short circuit issue.

6. Is it possible to reset the OBDII code C12B7 GMC without fixing the underlying issue?

- Resetting the code without fixing the underlying issue is not recommended, as the problem will persist and may pose safety risks while driving.

7. Can a DIY enthusiast fix the ABS high pressure accumulator pressure sensor circuit short to battery problem?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address this issue by following repair guides or consulting with professionals.

8. How much does it typically cost to repair OBDII code C12B7 GMC at a mechanic or dealership?

- The repair costs for this OBDII code can vary depending on the extent of the damage, parts needed for replacement, and labor rates of the service provider.

9. Are there any preventative measures to avoid triggering the ABS high pressure accumulator pressure sensor circuit short to battery code?

- Regularly inspecting the ABS system components, ensuring proper wiring connections, and addressing any issues promptly can help prevent this code from triggering.

10. How long does it take to repair the ABS high pressure accumulator pressure sensor circuit short to battery issue?

- The repair time can vary based on the complexity of the problem, availability of parts, and the experience of the technician, but it may take a few hours to complete the repair.